Invited speakers
... solar planets display highly elliptical orbits, our models include changes in angular velocity and orbital distance resulting from such elliptical orbits. Current Earth based photometry is limited to a precision of about 100ppm of the parent's stars luminosity due to atmospheric extinction. However, ...
... solar planets display highly elliptical orbits, our models include changes in angular velocity and orbital distance resulting from such elliptical orbits. Current Earth based photometry is limited to a precision of about 100ppm of the parent's stars luminosity due to atmospheric extinction. However, ...
HR4796A_telesco - University of Florida Astronomy
... comparison of our results to the HST NICMOS observations, we summarize the model here. W2000 consider the dynamical interaction of a circumstellar disk and a stellar or planetary companion, a study initially motivated by the desire to understand how such interactions generate asymmetries and other s ...
... comparison of our results to the HST NICMOS observations, we summarize the model here. W2000 consider the dynamical interaction of a circumstellar disk and a stellar or planetary companion, a study initially motivated by the desire to understand how such interactions generate asymmetries and other s ...
Radio emissions from terrestrial planets around white dwarfs
... over 1000 yr timescales in each pulse. The thermal pulses provide another mechanism (besides tidal drag) to bring terrestrial planets into closer orbits. This is illustrated schematically in Fig. 3, where four terrestrial planets (p1, p2, p3 and p4) orbit a MS star (stage 1). When the star enters th ...
... over 1000 yr timescales in each pulse. The thermal pulses provide another mechanism (besides tidal drag) to bring terrestrial planets into closer orbits. This is illustrated schematically in Fig. 3, where four terrestrial planets (p1, p2, p3 and p4) orbit a MS star (stage 1). When the star enters th ...
OPTIMIZATION OF THE FIBER-OPITC FABRY-PEROT INTERFEROMETER CONSTRUCTION Małgorzata Jędrzejewska-Szczerska,
... be noted that for ∆φ=0 there is no spectral modulation (Fig.3a)). If the phase difference between the interfering beams varies from zero, the function takes the form of the cosine curve (Fig.3b). The spacing of adjacent transmission peak is proportional to the inverse of the optical path difference ...
... be noted that for ∆φ=0 there is no spectral modulation (Fig.3a)). If the phase difference between the interfering beams varies from zero, the function takes the form of the cosine curve (Fig.3b). The spacing of adjacent transmission peak is proportional to the inverse of the optical path difference ...
Physics Specimen Question Paper National 5
... Attempt ALL questions in this section. Instructions for completion of Section 1 are given on Page two. SECTION 2 — 90 marks Attempt ALL questions in this section. Read all questions carefully before answering. Use blue or black ink. Do not use gel pens. Write your answers in the spaces provided. Ad ...
... Attempt ALL questions in this section. Instructions for completion of Section 1 are given on Page two. SECTION 2 — 90 marks Attempt ALL questions in this section. Read all questions carefully before answering. Use blue or black ink. Do not use gel pens. Write your answers in the spaces provided. Ad ...
Kidd_Thesis_2015April14_Final.
... Classical Cepheids can oscillate or pulsate in several different modes -fundamental, first-overtone, second-overtone, or a combination of these. Fundamentalmode Cepheids often have periods that are a few days long, and their light curves tend to be asymmetric, although there are some exceptions [2]. ...
... Classical Cepheids can oscillate or pulsate in several different modes -fundamental, first-overtone, second-overtone, or a combination of these. Fundamentalmode Cepheids often have periods that are a few days long, and their light curves tend to be asymmetric, although there are some exceptions [2]. ...
Kidd_Thesis_2015April15_Final.
... Classical Cepheids can oscillate or pulsate in several different modes -fundamental, first-overtone, second-overtone, or a combination of these. Fundamentalmode Cepheids often have periods that are a few days long, and their light curves tend to be asymmetric, although there are some exceptions [2]. ...
... Classical Cepheids can oscillate or pulsate in several different modes -fundamental, first-overtone, second-overtone, or a combination of these. Fundamentalmode Cepheids often have periods that are a few days long, and their light curves tend to be asymmetric, although there are some exceptions [2]. ...
Jul y 10-12,
... We are studying all the RXTE (PCA and ASM), INTEGRAL (JEM-X) and Beppo SAX (WFC) data available for the Rapid Burster (RB). Our purpose is to find more clues of the nature of type II bursts and to characterize the type I bursting behavior of the RB. One of the classes of type I bursts we found, feat ...
... We are studying all the RXTE (PCA and ASM), INTEGRAL (JEM-X) and Beppo SAX (WFC) data available for the Rapid Burster (RB). Our purpose is to find more clues of the nature of type II bursts and to characterize the type I bursting behavior of the RB. One of the classes of type I bursts we found, feat ...
Coherence - Studentportalen
... The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere on the wavefront. Perfect spatial coherence can be achieved if we have a point source. Then the phase at all points on the spherical wavefront are correl ...
... The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere on the wavefront. Perfect spatial coherence can be achieved if we have a point source. Then the phase at all points on the spherical wavefront are correl ...
Periodically Poled Lithium Niobate (PPLN) - Tutorial
... created with the desired shape. The design of the electrodes is key to producing perioficity a short PPLN crystal that can be used for an efficient SHG process, which produces photons in the visible portion of the electromagnetic spectrum. Example uses of PPLN Optical Parametric Oscillator: One of t ...
... created with the desired shape. The design of the electrodes is key to producing perioficity a short PPLN crystal that can be used for an efficient SHG process, which produces photons in the visible portion of the electromagnetic spectrum. Example uses of PPLN Optical Parametric Oscillator: One of t ...
Biomedical Imaging and Applied Optics Laboratory
... More than 85% of all cancers originate in the epithelium that lines the internal surfaces of organs throughout the body. Before they become invasive, at stages known as dysplasia and carcinoma in situ, early cancer cells alter the epithelial-cell architecture. More specifically, the number of cells, ...
... More than 85% of all cancers originate in the epithelium that lines the internal surfaces of organs throughout the body. Before they become invasive, at stages known as dysplasia and carcinoma in situ, early cancer cells alter the epithelial-cell architecture. More specifically, the number of cells, ...
Color Planetary Filters for Small Telescopes
... There are so many filters available that one can easily get lost. Even the manufacturer's recommendations are of no great help, since they are mostly for larger apertures of eight inch and over. That is why this article gives a recommendation for a filter set that matches perfectly with a small tele ...
... There are so many filters available that one can easily get lost. Even the manufacturer's recommendations are of no great help, since they are mostly for larger apertures of eight inch and over. That is why this article gives a recommendation for a filter set that matches perfectly with a small tele ...
IR3215521556
... into the end layer that its refractive index is n s [12]. We assume that all layers are isotropic and nonmagnetic and have the same properties or characteristic along all axis and incidence angle is zero. We suppose that the thickness of the end layer is very larger than the previous layers so that ...
... into the end layer that its refractive index is n s [12]. We assume that all layers are isotropic and nonmagnetic and have the same properties or characteristic along all axis and incidence angle is zero. We suppose that the thickness of the end layer is very larger than the previous layers so that ...
Optical Properties of Lithium - Zinc – Boro- MolybdateGlass
... separations fall in the useful range of ultraviolet to infrared through the visible range of the electromagnetic spectrum. The electronic transitions between these levels cause absorption in visible regions and impart color to the glass. Doped ions in crystalline or glassy matrices often give lumine ...
... separations fall in the useful range of ultraviolet to infrared through the visible range of the electromagnetic spectrum. The electronic transitions between these levels cause absorption in visible regions and impart color to the glass. Doped ions in crystalline or glassy matrices often give lumine ...
THE UV-OPTICAL GALAXY COLOR-MAGNITUDE DIAGRAM. III
... We use the Bruzual & Charlot (2003) stellar synthesis models to calculate the evolution of the spectral energy distribution. We assume solar metallicity and Salpeter initial mass function. The metallicity assumption is reasonable because, although there is a mass-metallicity variation, the bulk of t ...
... We use the Bruzual & Charlot (2003) stellar synthesis models to calculate the evolution of the spectral energy distribution. We assume solar metallicity and Salpeter initial mass function. The metallicity assumption is reasonable because, although there is a mass-metallicity variation, the bulk of t ...
2. Bright AGN phase
... In order to calculate the contribution to XRB from RIAFs in faint AGNs, one need to know the space number density of faint AGNs, most of which have not been observed in any waveband except those in the local universe. Every bright AGN will finally be switched to a faint AGN, so the density of faint ...
... In order to calculate the contribution to XRB from RIAFs in faint AGNs, one need to know the space number density of faint AGNs, most of which have not been observed in any waveband except those in the local universe. Every bright AGN will finally be switched to a faint AGN, so the density of faint ...
INTRODUCTION ...
... Therefore, research on the imported goods in the Mapungubwe Collection is of the utmost importance, as the discovery of the provenance of the artefacts would help to unravel the old trade routes through and around Africa. Indirectly it can also assist in refining the dating of the Mapungubwe archaeo ...
... Therefore, research on the imported goods in the Mapungubwe Collection is of the utmost importance, as the discovery of the provenance of the artefacts would help to unravel the old trade routes through and around Africa. Indirectly it can also assist in refining the dating of the Mapungubwe archaeo ...
The evolution of the Sun`s birth cluster and the search for the solar
... that this ratio is above 0.5 in the region given by: $ > 5 mas, 4 6 µ 6 6 mas yr−1 , and −2 6 Vr 6 0 km s−1 . Selecting stars from this region should increase the probability of success in identifying solar siblings through follow up observations. However the proposed pre-selection criterion is sens ...
... that this ratio is above 0.5 in the region given by: $ > 5 mas, 4 6 µ 6 6 mas yr−1 , and −2 6 Vr 6 0 km s−1 . Selecting stars from this region should increase the probability of success in identifying solar siblings through follow up observations. However the proposed pre-selection criterion is sens ...
The optical afterglow and z = 0.92 early
... We initiated R-band observations of GRB 100117A with the Inamori Magellan Areal Camera and Spectrograph (IMACS) on the Magellan/Baade 6.5-m telescope on 2010 January 18.04 UT (3.9 hr after the burst) and detected the four sources noted by Cenko et al. (2010) within the initial XRT error circle. We s ...
... We initiated R-band observations of GRB 100117A with the Inamori Magellan Areal Camera and Spectrograph (IMACS) on the Magellan/Baade 6.5-m telescope on 2010 January 18.04 UT (3.9 hr after the burst) and detected the four sources noted by Cenko et al. (2010) within the initial XRT error circle. We s ...
Note - HKU Physics
... 5. The star is in local thermodynamic equilibrium (LTE). In other words, every microscopically large but macroscopically small region is very close to and hence can be well approximated by a region in thermodynamic equilibrium. Thus, it makes sense to talk about thermodynamic variables such as tempe ...
... 5. The star is in local thermodynamic equilibrium (LTE). In other words, every microscopically large but macroscopically small region is very close to and hence can be well approximated by a region in thermodynamic equilibrium. Thus, it makes sense to talk about thermodynamic variables such as tempe ...
Ab initio calculations of optical properties of silver clusters: Cross
... range of applications, e.g., in photonic devices, as chemical used on hundreds of atom systems is the capacitancesensors [1, 2, 3, 4, 5], in bio-imaging [6], in drug delivery [7], polarizability interaction model [23, 24] which has been cancer therapy [7, 8, 9], optical manipulation [10, 11, 12, 2], ...
... range of applications, e.g., in photonic devices, as chemical used on hundreds of atom systems is the capacitancesensors [1, 2, 3, 4, 5], in bio-imaging [6], in drug delivery [7], polarizability interaction model [23, 24] which has been cancer therapy [7, 8, 9], optical manipulation [10, 11, 12, 2], ...
banff04
... Critical Macc at which all stellar UV photons are absorbed by in-falling matter plotted against spectral type (Walmsley 1995, Churchwell 2002): ...
... Critical Macc at which all stellar UV photons are absorbed by in-falling matter plotted against spectral type (Walmsley 1995, Churchwell 2002): ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.